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Abstract

Disclosed is an invention that allows the alignment within microns of the pads of a Cube with the Probes in a burn-in fixture.

Country

United States

Language

English (United States)

This text was extracted from an ASCII text file.

This is the abbreviated version, containing approximately
97% of the total text.

Cube Burn-In Alignment Fixture

Disclosed is
an invention that allows the alignment within
microns of the pads of a Cube with the Probes in a burn-in fixture.

The burn-in
fixture has a probe spring loaded mechanism which
has to align with the pads located on the Cube surface. There are
over one hundred pads, which are microns in size, located on the
Cubes surface and a critical amount of pressure has to be applied to
each pad for contact purposes during the burn-in procedure. The
complex portion of this design deals with being able to align each
pad with its probe within microns. This
is accomplished through a
separate alignment fixture which is set up of line under a
microscope. The fixture is designed with
a fine X,Y adjustment. A
small rectangle box which has a rectangle hole in the center with two
slip fit dowel pin holes which align with dowel pins located in the
burn-in fixture. The X,Y adjustment is
provided through a spring
loaded pad on one side and a very fine threaded shaft attached to a
pad on the opposite side. These are
located in the rectangular box
walls. The Cube is placed into the
rectangle hole between the
threaded pads and spring loaded pads.
The assembly is placed under a
microscope and the critical alignment is made adjusting the threaded
pads in relation to a scribed line on the box and the dowel pin
holes. After the alignment is completed
the aligned assembly is
placed into the burn-in fixture and the burn-in t...